205216430 has 16 divisors (see below), whose sum is σ = 379373760. Its totient is φ = 79867872.

The previous prime is 205216423. The next prime is 205216433. The reversal of 205216430 is 34612502.

It is a super-2 number, since 2×205216430² = 84227566283889800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205216396 and 205216405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205216433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276950 + ... + 277689.

It is an arithmetic number, because the mean of its divisors is an integer number (23710860).

Almost surely, 2^205216430 is an apocalyptic number.

205216430 is a deficient number, since it is larger than the sum of its proper divisors (174157330).

205216430 is a wasteful number, since it uses less digits than its factorization.

205216430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554683.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 205216430 is about 14325.3771329065. The cubic root of 205216430 is about 589.8442852499.

Adding to 205216430 its reverse (34612502), we get a palindrome (239828932).

The spelling of 205216430 in words is "two hundred five million, two hundred sixteen thousand, four hundred thirty".